Marble game board



FIG. 1 is a top plan view of the marble game board embodying the design of the present invention;

FIG. 2 is a bottom view thereof;

FIG. 3 is a typical elevational view thereof, all elevational views being identical to the view shown in FIG. 3; and,

FIG. 4 is a perspective view thereof. 

The ornamental design for a marble game board, as shown and described. 